NEW: DECLASSIFIED FBI Probe "PLASMIC ECHO" - Appears to use FBI investigative tool known as a "Pen Register" to target phone calls of then campaign manager @SusieWiles47 - Allegedly tracked nearly two dozen defense attorneys, five journalists, @FLOTUS, political advisers including @FBIDirectorKash - Administration official characterizes as "intrusive tactics" by special counsel Jack Smith team - Probe laid groundwork for classified records case against President Trump Pen Register Trap and Trace or PRTT - Surveillance tool collects non-content routing data - Phone numbers dialed or received - Call times and duration Two Scenarios - Used for criminal and national security investigations - lower standard than probable-cause warrant Potential Violations - First (Freedom of Speech) and Fourth Amendments (unreasonable search and seizure) NOTE: Former Senior FBI agent says it looks like a classic FBI "tickle the wire" operation. After FBI agents contact Wiles, the bureau tracks phone calls to identify who she immediately contacts "On 10 April 2023, FBI WFO (Washington Field Office) reviewed WILES's telephonic activity to determine contacts of interest on the date of her FBI interview." Declassified records via @WhiteHouse transparency task force